Find the mean and standard deviation of the following probability distribution: `x_i :2\ \ 3\ \ 4` `p_i : 0.2\ \ 0. 5\ 0. 3`

Find the standard deviation of the following probability distribution

Find the mean and standard deviation of the following probability distribution: x_i :\ \ 1\ \ 2 \ \ 3\ \ 4 p_i :\ \ 0. 4\ \ 0. 3\ \ 0. 2\ \ 0. 1

Find the mean and standard deviation of each of the following probability distribution: x_i :1\ \ 3\ 4\ 5 p_i : 0.4\ 0. 1\ 0. 2\ \ 0. 3

Find the mean and standard deviation of the following frequency distribution :

Find the mean and standard deviation for the following frequency distribution:

Find the mean and standard deviation of the following probability distribution: x_i :\ -1\ \ 0\ \ 1\ 2\ \ 3 p_i :\ \ 0. 3\ 0. 1\ 0. 1\ \ 0. 3\ 0. 2

Find the mean and standard deviation of the following probability distribution: x_i :-3\ \ -1\ 0\ \ 1\ \ 3 p_i :\ \ 0. 05\ \ 0. 45\ \ 0. 20\ \ 0. 25\ 0. 05

Find the mean and standard deviation of the following probability distribution: x_i :-3 -1 0 1 3 p_i : 0. 05 0. 45 0. 20 0. 25 0. 05

Find the mean and standard deviation of the following probability distribution: x_i : \ -2 \ \ -1\ \ 0\ \ 1\ \ 2 p_i :\ \ 0. 1\ \ 0. 2 \ \ 0. 4\ \ 0. 2 \ \ 0. 1

Find the mean and standard deviation of the following probability distribution: x_i :-5\ -4\ \ 1\ \ 2 p_i :1/4\ \ 1/8\ \ 1/2\ 1/8